inexperienced centre-back partnership with 20-year-old Joe Davis as Vale lost 2–0 to league leaders Brentford at Griffin Park. He was publicly praised by Adams for his performance in the match. He scored his first professional goal with a header in a 1–0 win over Oldham Athletic at Vale Park on 18 January and was named on the Football League team of the week. He impressed in his first four appearances for the "Valiants", and his loan deal was extended until the end of the season. Fulham recalled Grimmer on 27 March 2014 by exercising a clause in the loan agreement, as manager Felix Magath wanted cover for some defensive injuries. He joined League Two club Shrewsbury Town on a one-month loan on 18 October 2014. He was persuaded to join the "Shrews" after hearing good things about the club from his friend Fraser Fyvie and being told by manager Micky Mellon that he would fit in with the style of football at New Meadow. Grimmer played seven matches for Shrewsbury, including five consecutive league victories and their 2–1 defeat to Chelsea in the League Cup. Although the loan had been extended to 3 January 2015, he was recalled to Fulham on 24 November and made his Fulham league debut on 29 November against Brighton & Hove Albion at the Falmer Stadium. He made a total of 17 appearances for Kit Symons's "Cottagers" during the 2014–15 campaign, and signed a new two-and-a-half-year contract in March. On 5 January 2016, Grimmer returned to Shrewsbury on loan until the end of the season. He made his second debut for the club five days later, as he helped Shrewsbury to keep a clean sheet as they beat Cardiff City 1–0 in the FA Cup third round. On 30 January, in the next round at home to Sheffield Wednesday, he headed an added-time winner in a 3–2 victory, after Shrewsbury had trailed 2–1 with five minutes remaining. He was ever-present for the duration of his second loan spell at the club, helping them avoid relegation with a 20th-placed finish in their first season back in League One. On 31 August 2016, he returned to Shrewsbury Town on a loan deal to run until the end of the 2016–17 season. He was in and out of the first eleven under new manager Paul Hurst, and ended the campaign with 27 appearances to his name. He was